Rigid magnetic recording media

Details Rigid magnetic recording media Rigid magnetic recording media

G - Physics

11

B

352/31, 117/24.4

G11B 5/702 (2006.01) C08G 18/40 (2006.01) C08G 18/58 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1236213

ABSTRACT OF THE DISCLOSURE RIGID MAGNETIC RECORDING MEDIA A rigid magnetic storage media coating composition using a high concentration of magnetic particles includes a dual thermoset binder system. The two polymers forming the dual binder system cure during mutually exclusive temperature ranges to form polymer networks that are interpenetrated and entangled. The thermoset polyurethane-melamine/ polyester polymer binder system possesses improved properties including the ability to retain liquid fluorinated polyether lubricant without spin-off. The addition of a small amount of silicone wax to the uncured coating composition enhances composition rheology during spin coating on a rigid substrate.

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